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MCQs

Total Questions : 3147 | Page 29 of 315 pages
Question 281. The stability of a dam is checked for
  1.    Tension at the base
  2.    Overturning of the wall or dam
  3.    Sliding of the wall or dam
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 282. Any change in load is adjusted by adjusting following parameter on turbine
  1.    Net head
  2.    Absolute velocity
  3.    Blade velocity
  4.    Flow
 Discuss Question
Answer: Option D. -> Flow
Question 283. Flow of water in a pipe about 3 meters in diameter can be measured by
  1.    Orifice plate
  2.    Venturimeter
  3.    Rotameter
  4.    Pitot tube
 Discuss Question
Answer: Option D. -> Pitot tube
Question 284. Pressure of the order of 10" torr can be measured by
  1.    Bourdon tube
  2.    Pirani Gauge
  3.    Micro-manometer
  4.    Ionisation gauge
 Discuss Question
Answer: Option D. -> Ionisation gauge
Question 285. The most economical section of a trapezoidal channel is one which has hydraulic mean depth equal to
  1.    1/2 × depth
  2.    1/2 × breadth
  3.    1/2 × sloping side
  4.    1/4 × (depth + breadth)
 Discuss Question
Answer: Option A. -> 1/2 × depth
Question 286. The pressure of liquid at throat in a Venturimeter is __________ than that at inlet.
  1.    Higher
  2.    Lower
  3.    Same
  4.    None of these
 Discuss Question
Answer: Option B. -> Lower
Question 287. Fluid is a substance which offers no resistance to change of
  1.    Pressure
  2.    Flow
  3.    Shape
  4.    Volume
 Discuss Question
Answer: Option C. -> Shape
Question 288. A bucket of water is hanging from a spring balance. An iron piece is suspended into water without touching sides of bucket from another support. The spring balance reading will
  1.    Increase
  2.    Decrease
  3.    Remain same
  4.    Increase/decrease depending on depth of immersion
 Discuss Question
Answer: Option C. -> Remain same
Question 289. According to fan laws, at constant weight of air or gas, the speed, capacity and pressure vary
  1.    Directly as the air or gas density
  2.    Inversely as square root of density
  3.    Inversely as density
  4.    As square of density
 Discuss Question
Answer: Option C. -> Inversely as density
Question 290. A hemispherical tank of radius (R) has an orifice of cross-sectional area (a) at its bottom and is full of liquid. The time required to empty the tank completely is
  1.    14π R1/2/15Cd × a √(2g)
  2.    14π R3/2/15Cd × a √(2g)
  3.    14π R5/2/15Cd × a √(2g)
  4.    14π R7/2/15Cd × a √(2g)
 Discuss Question
Answer: Option C. -> 14π R5/2/15Cd × a √(2g)

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